SB20260424214 - Deadlock in Linux kernel bluetooth
Published: April 24, 2026
Security Bulletin ID
SB20260424214
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Deadlock (CVE-ID: CVE-2026-31499)
CWE-ID: CWE-833 - Deadlock
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper locking in l2cap_conn_del() when canceling delayed work items. A local user can trigger Bluetooth L2CAP connection deletion while the associated timer work is executing to cause a denial of service.
Remediation
Install update from vendor's website.